Automobile or vehicle greasing jack



Sept. 13, 1932. J. A. SCHOENB ERG 1,377,364

AUTOMOBILE OR VEHICLE GREASING JACK Filed Sept. 25. 1950 2 Sheets-Sheet 1 llllllllllill INVE TOR. A? Sa e/May ATTORNEYS.

Sept. 13, 1932. J. A. SCHOENBERG 1,877,364

AUTOMOBILE 0R VEHICLE GREASING JACK Filed Sept. 25, 1930 2 Sheets-Sheet 2 IN VEN TOR.

A TTORNEYS.

Q7///////////A// 7 ////////%E Patented Sept. 13, 1932 PATENT OFFICE JACOB A. SCHOENIBERG, OF SPOKANE, WASHINGTON AUTOMOBILE OR VEHICLE GREASING JACK Application filed September 25, 1930. Serial No, 484,424.

This invention relates to an automobile or vehicle reasing jack.

An ject of my invention is the construction of simple and eflicient jacks, whereby a motor vehicle, airplane, etc., can be rocked for securing an eflicient distribution of the lubricant on parts of the same.

Another object of my invention. is the construction of novel and etlicient jacks which are assembled in an efficient manner. and controlled by a common unit for actuating the jacks for producing a rocking motion to a supported motor vehicle, airplane, etc. A still further object of my invention is the construction of the jack whereby the stroke of the piston is easily controlled and the adjustment of the jack screw is also easily obtained and maintained.

With the foregoing and other objects in view, my invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings: Figure 1 is a view in elevation, partly shown in section of an apparatus con.- 3 structed in accordance with the present invention. Figure 2 is a top plan view of the nut. Figure 3 is a sectional view taken on line 3-3, Figure 2, and looking in the direction of the arrows.

Figure 4 is a view in side elevation of the nut.

Figure 5 is a vertical, central, sectional view of the casing of the jack, while Figure 6 is a top plan view of the same.

Figure 7 is a View in side elevation of the jack valve, while Figure 8 is a vertical sectional view of the same.

Figure 9 is a sectional view taken on line 9-9, Figure 1, and looking in the direction of the arrows.

Referringto the drawings by numerals, 1, 1 designates the two jacks shown, which are connected in the manner hereinafter described. Each jack 1 comprises a base 2 having uprights 3, which base 2 and uprights 3 constitute a support for the casing 4 of the jack. Casing 4 is suitably mounted upon the bottom plate 5, which plate 5 is pivotally l5 mounted at 6 upon said uprights 3, whereby the casing 4 and its co-operating parts can rock upon the support constituted by said uprights 3 and base The casing 4 is provided with an auxiliary 00 casing 7, in which the jack valve 8 is mounted. A vertically sl'idable' cylindrical piston 9 is mounted within casing 4 and is provided at its lower end with head 10. A revoluble head or nut 11 is mounted upon the upper end of mounted upon the upper end of piston 9. This nut 11 (Figs. 2 to 4) is provided with an annular flange 12 at its upper end and with a depending neck 13. In neck 13 is an annular groove 14 into which screw-15 projec-ts (Fig. 3) for holding the nut against displacementofi piston 9. The interior of the nut is threaded as at 16 and into this threaded portion is threaded the jack screw 17. On the upper end of the jack screw is a fork or 78 saddle 18. This saddle is placed under the part of the motor vehicle to be engaged. "In operation, a jack is placed under each side of the motor vehicle midway between the front and rear wheels and directly beneath 0 the side frame member, the saddle 18 being screwed up against the frame member by means of said knurled nut 11, until sufficient tension is gained to insure constant contact when rocking the car or motor vehicle through operation of the jacks. By means of spanner sockets 19, greater tension is permitted because a suitable tool engaging these sockets will permit a tighter adjustment than can be obtained by hand.

To lock adjusting nut 11 in place so it Wlll not move during use of the jack, turn said nut until the nut lock bolt 20 is opposlte slot 21 (Fig. 1) in jack screw 17, press bolt 20 inward and turn until the bayonet socket 22 locks bolt 20 in position to lock jack screw 17 It will be noted (Fig. 3) that when the bolt 20 is rotated until the inner end of screw 21a registers with the socket 22, by

reason of the spring 23 pressing on the enmo larged portion of the bolt, the inner end of screw 21a will move into the socket 22, allowing the inner end of the bolt to move out of the screw thread of ack screw 17, whereby the jack screw can be revolved within the nut, or the nut revolved upon the jack screw. Therefore, it will be seen that I have pro; vided means for locking the nut 11 against independent rotary movement-upon the jack screw 17. v

To adjust the stroke of jack withdraw stroke bolt 24, against the spring 25, by drawing out the trip block 26, which is fastened to said bolt 24. Then depress clutch pin 27, turning nut 11 until theinner end of pin.

27 entersone of the four sockets28 in top the piston.

The stroke bolt 24 is carried by-a head 30, in which spring 25 is mounted. This head 30 is integral with the upper end of the jack valve 8. Through this connection, when the jack valve is to be lifted as hereinafter described, this is accomplished by the piston during the last position of its upward movement. The stroke bolt 24 is normally in one of the several slots 29, being held therein by the action of said spring 25.

Air from a compressor (not shown) is admitted to the master valve 32 (Fig. 1) through supply pipe 33 and control valve 34 to chamber around piston valve 35, passing through pipe and hose 36 and nozzle 37 into casing 4 and forces up piston 9. The piston 9 rises until the bottom of stroke groove 29 engages the stroke bolt 24, lifting the jack valve 8; this lifting movement is continued until port 38 communicates with .port 39 of the jack valve 8; then air exhausts through port 40 and nozzle 42 into pipe and hose 43 to master valve case 32 and strikes the outer end of master valve piston 35, forcing it over to allow air under pressure to pass from pipe 33 and valve 34into inlet pipe 36a and thence to the jack at the left hand of Fig. 1, in the same manner as hereinbefore described for the jack at the right hand of Fig. 1. This permits air in cylinder 4 at the right hand of Fig. 1 to escape through pipe 36 and exhaust pipe 44 and exhaustvalve 45. It will, therefore, be understood that in Figure 1 air is being admitted to the right hand jack, through pipe 36 and exhausted from the left hand jack through pipe and hose 36a.

Adjustment of the valve 45 regulates the speed of discharge and cushions the return stroke of the jack pistons 9. At 46 the reduced diameter of the top of each casing 4 prevents the piston 9 from being thrown out of said casing when not under load.

To permit jacks to conform to sidewiso motion of the car or motor vehicle, they are desi ned to oscillate or rock on pins 6, as hereinbefore described.

It will also be understood that as each piston 9 returns to the bottom of the casing 4, the upper end of the piston stroke slot 29 engages stroke pin 24, carrying jack valve 8 to bottom of stroke, closing inner port 38 and aligning groove 41 (Fig. 1) with ports 40 and 40a, whereby air in nozzle 42 and hose and pipe 43 exhausts to the outer atmosphere.

To the leftof pin 6 on left hand base uprights 3 is shown a boss 49 designed to engage a suitable part of the base 5, holding the Jack in u an upright position to facilitate stroke adjustment or lubrication. Tipping the casing in the opposite direction, or away from the jack valve 8 permits the casing to 'fall low toolear car when driving into the pit, not shown, or placing under car, plane, or other machine. 7

Leather buffers 50 are shown (Fig. 1) fastened to the bottom of each piston 9 and to the ends of master valve piston 35, for the purpose of deadening shock and lessening noise of moving parts at end of stroke.

It will be understood that nut 11 is free to move, rotatably speaking, until the clutch pin 27 is depressed, whereupon, generally speaking, the nut and piston rotate synchronously.

While I have described the preferred embodiment of my invention and illustrated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claims.

What I claim is: i

1. In a grease jack, the combination with a support, of a casing mounted on said support, a sliding piston in said casing, means in the side of said casing and in the side of said piston for varying the stroke of the pis ton, and a jack screw mounted on the piston.

2. In a grease jack, the combination of a support, a casing carried by said support, a slidable piston in said casing, said piston provided with a stroke slot or socket in its side, means carried by said casing and extending into said slot for limiting the movement of said piston, and a jack screw mounted upon said piston.

3. In a grease jack, the combination of a support,.a casing carried by said support, a slidable piston in said casing, said piston provided with aligned slots in its side and of difierent lengths, a stroke bolt carried by said casing and. normally extending into one of said slots, and a jack screw mounted upon said iston.

4:. In a grease jack, the combination with a support, of a casing carried by said support, a slidable piston in said casing, said piston provided with a stroke slot, a spring pressed stroke bolt carried by said casing and extending at its inner end into said slot, a grip block on the outer end of said stroke bolt, and a ja ck screw mounted in said piston.

5. In a grease jack, the combination with a support, of a casing carried by said support, a sliding piston in said casing, a jack valve on the side of said casing, means engaging and controlling the stroke of said piston, said controlling means secured to said jack valve for synchronous movement therewith, and a jack screw mounted on said piston.

6. In a grease jack, the combination with a support, of a casing mounted on said support, said casing provided on its side with a jack valve, a sliding piston within said casing, said jack valve and easing provided with ports adapted to register for exhausting air from within said casing, said piston provided with an elongated stroke slot, a head secured to the outer end of said ack Valve, a spring pressed stroke bolt mounted on said head and extending into said stroke slot, whereby extreme movement of the piston in one direction will operate the jack valve for exhausting air from the casing, and a jack screw carried by said piston.

7. In a grease jack, the combination with a support, of a casing on said support, said casing provided in itsside with a jack valve, said jack valve having an exhaust groove and an exhaust port, said casing having exhaust ports adapted to register with said exhaust port and exhaust groove of said jack valve, a sliding piston in said casing, said piston provided with a stroke slot in its side, a head integral with the outer end of said ack valve, a spring pressed stroke bolt extending through said head and into said stroke slot, 4

a trip block on the outer end of said stroke bolt, said stroke bolt adapted to lift said jack valve when the piston is moved to its outermost position of adjusted stroke for exhausting air through the jack valve, and a jack screw in the outer end of said piston.

8. In a grease jack, the combination with a support, of a casing carried by said support, a sliding piston in said casing, a rotatable nut on the outer end of said piston, means for fastening said nut on said piston, means for locking said nut against rotary movement upon said piston, a jack screw in said nut, and means on said nut for locking said jack screw against rotary movement upon the nut.

9. In a grease jack, the combination with a support, of a casing carried by said support,-

a piston Within said casing, a rotatable nut against the outer end of said piston and extending into same, a clutch pin on said nut and adapted to engage the outer end of said piston for locking the nut and piston against independent movement, a jack screw threaded through said nut, and a lock bolt on said nut and engaging the thread of said jack screw for locking the jack screw against rotary movement upon the nut.

10. In a grease jack, the combination with a support, of a casing carried by saidsupport, a piston in said casing, said piston provided in its outer end with a plurality of sockets, a rotatable nut mounted on the outer end of said piston, detachable means fastening the piston and nut against accidental displacement, aspring pressed clutch pin on said nut and adapted to extend into one of the sockets in the outer end of said piston, a jack screw threaded through said nut, a lock bolt provided with a bayonet socket on said nut and adapted to extend into a thread of said jack screw-and for locking the jack screw on the nut, and a screw on said nut and extending into said bayonet socket of said lock bolt, substantially as shown and described. v

11. In a grease jack, the combination with a support,'of a casing carried by said support, a piston slida'bly mounted on said casing, a rotatable nut on said casing, means on the nut and casing for locking them against independent rotary movement, a jack screw on said nut, and means on the nut and jack screw for locking them against independent rotary movement.

12. In a grease jack, the combination with a support, of a casing pivotally mounted on said support, said casing provided with a boss for engaging the support for limiting movement of the casing in one direction, and a screw-carrying piston in said casing.

In testimony whereof I hereunto aflix my signature.

JACOB A. SCHOENBERG. 

